Adjusting speed during beam pump cycle using variable speed drive
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United States of America Patent
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-
Sep 15, 2020
Grant Date -
N/A
app pub date -
Jul 8, 2016
filing date -
Jul 8, 2016
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A well has a wellbore extending from a surface. Tubing extends within the wellbore for supporting a downhole pump. Sucker rods extend within the tubing for reciprocating a travelling valve. A load calculator determines loading on the sucker rods during a pump cycle. A variable speed driver reciprocates the sucker rods and travelling valve. A real time speed controller varies a speed of the driver in response to loading information from the load calculator for smoothing the rod load in a beam pump cycle. A target rod load is obtained and a surface linear speed of rods is varied by either slowing or speeding a driver for varying a surface linear speed of the rods when rod loading is above or below the target rod load.
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